- Position: Senior Engineer (Product Infrastructure & Platform)
- Type of contract: B2B
- Working model: on-site only
Role overview:
Our client does not just build software; they engineer competitive advantages. They are building a proprietary, near-deterministic AI-powered development platform designed for broad developer adoption, operating at the absolute frontier of technology alongside the world’s leading AI labs.
They are looking for a Senior Engineer to join their product execution team. This is not a role for someone who only wants to write isolated features. This is a role for an expert individual contributor who takes Extreme Ownership over the core product surface—including the developer UI, backend services, CLI tools, and advanced execution agents that thousands of engineers rely on daily. You will build and evolve their core developer platform end to end: from the React-based user interface and Node.js-based backends that stream complex agent execution steps, through state-machine agent frameworks, to robust authentication, billing, and system integrations that make the platform enterprise-ready. You will collaborate closely with engineering and architecture teams to deliver an unparalleled developer experience.
Requirements:
Experience
- 8+ years of hard-core software engineering experience.
- Proven track record as a Senior or Expert-level individual contributor.
- Confidence owning complex product initiatives from initial design through to production.
Technical Depth & Skills
- Absolute expertise in TypeScript, Node.js, React, and Next.js.
- Hands-on experience building with LLMs and AI agent architectures in real-world production environments.
- Comfort working with containerized environments (Docker) and VM ecosystems for isolated, secure execution of generated code.
- Deep understanding of monorepo structures (such as Nx) and a clear grasp of why large-scale enterprise codebases are organized this way.
- Familiarity with the modern developer tools ecosystem, including IDE extensions, custom CLIs, and third-party developer integrations.
Extreme ownership
- You do not wait for tasks to be assigned; you proactively identify gaps and structural challenges.
- You see a complex engineering problem, design a clean solution, align the necessary resources, and deliver with absolute certainty.
- You naturally take accountability for final outcomes and user experiences, not just isolated implementation details.
Mentoring & Collaboration
- Ability to elevate the entire engineering team through high technical standards and clear architectural guidance.
- Confidence collaborating hands-on in a shared office environment through pair programming, interactive design discussions, and direct exchange.
- Skill in helping fellow engineers grow into entirely independent problem solvers.
Business DNA
- Deep understanding that code serves core business objectives and strategic ROI, not just technical elegance.
- Ability to create durable operating leverage through sound technical choices and future-proof design.
- Strong instinct for connecting low-level system architecture choices directly with company value.
What you can expect
- Frontier Product: Building state-of-the-art systems and state-machine architectures that redefine how modern developers interact with AI workflows.
- Elite Environment: Working alongside C-level executives, industry visionaries, and core platform architects with no corporate theater or bureaucratic overhead.
Responsibilities:
- IDE Extensions & Backends: Build and optimize the IDE user interface layer and streaming backends that seamlessly connect developers to long-running coding agents.
- State-Machine Agents: Develop, test, and improve automated AI workflows—ranging from frontend component generation to domain-specific code adjustments—using a proprietary state-machine framework.
- CLI Tooling: Create and maintain powerful command-line utilities optimized for automated code generation, linting, and developer agent debugging.
- User-Facing Platform Surface: Design and implement secure authentication flows, subscription management, and enterprise-grade VCS integrations (e.g., GitHub, Azure DevOps, cloud suites).
- Scale & Infrastructure Collaboration: Work closely with infrastructure engineers to deploy secure, containerized agent runner infrastructure to the cloud at scale, contributing across the stack as needed.
Recruitment process:
- 1.5-hour pair programming session with our client’s core engineering team.
- 1-hour technical interview with the Principal Engineer.
- Optional additional 1-hour conversation to explore deeper fit or alternative skillsets.
- Final decision and offer.
Perks in the office:
- Premium coffee selection
- Secure bike parking
- On-site shower facilities
- Free selection of beverages
- Complimentary snacks
- Modern, high-end office space
- No dress code policy
- Dedicated playroom and relaxation area
Benefits:
- Dedicated conference and professional development budget
- Flexible working hours
